每日習(xí)語(yǔ)：know one‘s beans(6.10)

字號(hào)： 小 中 大

know one's beans
    熟悉（精通）自己的業(yè)務(wù)
    例句：
    Though she is very clumsy at doing housework, she knows her eans in working.
    雖然她在做家務(wù)方面笨手笨腳的，在工作方面卻很精通。